diff --git a/include/alisp/alisp.h b/include/alisp/alisp.h
index b955e62..7e1da96 100644
--- a/include/alisp/alisp.h
+++ b/include/alisp/alisp.h
@@ -14,6 +14,7 @@
 #include <alisp/stream.h>
 #include <alisp/sv.h>
 #include <alisp/symtable.h>
+#include <alisp/tag.h>
 #include <alisp/vec.h>
 
 #endif